Some two thousand million years ago, the mountain on the sun was raised probably because______.
A.a large tidal wave of a star travelled over the surface of the sun
B.another star happened to come near the sun
C.the sun and the moon raised the tides on the earth
D.the star moved away from the sun
第7题
B.四分之三(含四分之三)以上
C.五分之三(含五分之三)以上
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